Yarn winding machine



April E. SCHWEIZER ,955,027

YARN WINDING MACHINE Filed Jan. 20, 1931 2 Sheets-Sheet l III/l/I/ Ill/IlllII/II/[I/lII/IIIIII [71 renfar:

April 1934. E. SCHWEIZER 1,955,027

YARN WINDING MACHINE Filed Jan. 20, 1931 2 Sheets-Sheet 2 I p i I Inventor,

[21 6! ficiwez'zea W A'fZOZ'fi-PJ Patented Apr. 17, 1934 PATENT OFFICE YARN WINDING MACHINE Ernst Schweizer, Zurich, Switzerland Application January 20, 1931, Serial No. 510,022

y In Switzerland December 10,1929

'1 Claim. (Cl. 242-18) The subject of this invention is a machine for the parallel winding of yarns on to bobbins, which also enables different lengths of stroke or winding to be arranged for, the stroke of the thread guide remaining invariable during the winding operation when once set for the desired amplitude.

To enable the speed at which the yarn runs on to the bobbins to be maintained at a constant 1 value as the diameter of the bobbins increases in such machines, an automatic reduction of the rotational speed of the bobbinsis combined with.

the winding apparatus in the new machine.

In certain known winding machines of this type, although they can be adjusted for different lengths of winding, that length diminishes during the winding operation. These machines furnish bobbins with tapering ends, or, in order to obtain various lengths of winding with the same machine, the stroke eccentrics are interchangeable.

In the new machine on the contrary, thegreatest variety of lengths of winding can be obtained by means of a simple device and in a rapid, ac-

curate and reliable manner, in that the thread guide is correspondingly displaced on an obliquely disposed cam, whereby the desired adjustment of length is obtained.

Uniform yarn winding speeds with increasing diameter of the bobbin are known. They are obtained either by roller drive on the bobbin itself, or else by mounting on the bobbin a contact roller which, as the bobbin diameter increases,

receives a movement which is transmitted through a device to a friction-wheel mechanismior retarding the spindle speed. In both these cases, .the bobbin material suffers considerably, and is abraded and damaged by the rollers.

. Ratchet mechanism for producing uniform yarn winding speed as the bobbin diameter increases, is also known in order to produce a variation of drive on the friction-wheel mechanism. In such cases, however, the requisite ratchet motion is again derived from the rotation of the bobbins through a roller which also damages the material on the bobbin. Such ratchet mechanism, moreover, has to be adjusted by hand.

The combination of ratchet mechanism with depressible thread guides is also known, in which the descent sets up a movement which is utilized for varyingthedrive so as to feed the yarn on to the bobbins at uniform speed. I

The attainment of such uniform speed with increasingbobbin diameter is efiected, in accordance with the present invention, by means of a ratchet mechanism which receives its automatic ratchet movement throu'h the dependency of the shaft carrying the cams and is combined with the friction-wheel mechanism through a direct rod connection for effecting the reduction.

A typical embodiment of the invention is illustrated in the accompanying drawings.

Fig. 1 is a plan,

Fig. 2 a side elevation,

Fig. 3 a cross section alongI-I of Fig. 1,

Fig. 4 a cross sectionalong II-II of Fig. 1,

Fig. 5 a detail of the ratchet mechanism, and

Fig. 6 an elevation ofthe adjusting device.

The coacting main parts of the machine are: the drive for the machine and the bobbins, the 71, main shaft of the machine, the thread guide and adjusting device, the ratchet mechanism, and the stop motion. a

The construction of these parts will first be explained, followed by the manner in which the 7 machine functions.

As shown in Figs. 1 and 2, the drive for the machine and the bobbins consists of a motor-driven shaft 1 carrying a friction wheel 2, which is longitudinally displaceable (for example on a 30 feather) and actuates a friction wheel 3. The wheel 2 is provided with a groove 47, which is engaged by a roller 46 carried by an arm 45 fixed on a rockable shaft 44, mounted in opposite side walls of the casing 23. The friction wheel 3 is seated on the bobbin drive shaft 4 having the pinion 5 from which the drive is transmitted, through countershaft gears 6, 8 on the pin 7 pinion 9 on the main shaft 10, to the small pinion 11 on the other bobbin drive shaft 12. One of the bobbins S is shown in position between the end of the shaft 12 and the back support-48 which is adjustably mounted on the arm 49 extending from-a wall of the casing 23.

The main shaft 10 is driven through the same countershaft and carries the swash plate 13.

The thread guide device, with adjustment, comprises, firstly, the thread-guide member 14, which engages the swash plate 13, is adapted to be displaced on a rockable shaft 15 and also 1 engages a slidably mounted shaft 18 in such a way that it can turn or rock about the shaft but communicates its reciprocating movements thereto. The shaft 18 is journalled in links 19 and 20 which carry the rockable shaft 15. Two torsion springs 21 and 22 bear on the links 19 and 20. They act to keep the thread-guide member 14 down in engagement with the swash plate and prevent play or lost motion. Fixed on the hub of the link 20 outside the casing is an adjusting arm 24 carrying a set screw 26. A scale 25 (see Fig. 6) is mounted on the casing wall- 23, opposite the adjusting arm 24. 16 representsthe two longitudinally displaceable thread guides on the end of the shaft 18.

The ratchet mechanism is arranged to actuate a disc 43 designed, for example, as an eccentric and secured on the shaft 44. The eccentric 43 is connected to a wire or steel band 42, which is also led over a disc 41 on the shaft 40. This shaft 40 carries a worm wheel 39 and is pivotally mounted in the casing wall 23 (see Figs. 1, 2, 3 and 4). The shaft 40 (Fig. 5) is displaceably mounted and may be formed, outside the casing, as a handle. The worm wheel 39 meshes with the worm 38 (Figs. 2 and 3) on the shaft 37. On the other end is the worm 36 meshing with the worm wheel 35. The shaft 32 which carries the worm wheel 35, also carries ratchet wheel 34, outside the casing. The wheel 34 coacts with the .pawl 33 mounted on the rod pivoted on the shaft 32 (Figs. 3 and 5). This pivoted rod has a slot 31 engaged by a pin 29 on the wheel 2'7 of the main shaft 10. The pin 29 is adjustable in a diametrical groove 28 of the wheel 27 for varying the effective stroke of the ratchet mechanism. Finally, as can be seen from Figs. 2 and 3, the shaft 40, which is mounted, on the one hand, in the casing, is also mounted in a small gate in the wall of the casing.

The new winding machine operates in the following manner: The thread-guide member 14 is set, in relation to the swash plate 13, to the desired winding amplitude by means of the adjusting device 24, 26, and said amplitude is set on the scale 25 by means of the set screw 26. If a different amplitude is desired, the adjusting arm 24 is shifted, thus correspondingly displacing the guide member 14 in relation to the swashplate 13. By means of this possibility of adjustment, the invention enablesa great variety of winding amplitudes to be produced with a uniform amplitude of movement of the thread guide. When this adjustment has been effected the machine can be started.

The motor-driven shaft 1 causes the friction wheel 2 to revolve the friction wheel 3, thus rotating the bobbin and the swasliplate shaft-10 by means of known pinion gearing. At the same time, the yarn is wound on to the bobbin S,'the

diameter of which consequently begins to increase, thus tending to speed up the rate at which the thread is wound. In order to maintain said rate within uniform limits as the bobbin diameter increases, the ratchet mechanism actuated from the main shaft 10, comes into operation, in that, at each revolution of the main shaft, the eccentrically mounted ratchet lever 30, with the trailing pawl 33, describes an intermittent motion which can be adjusted to suit the thickness of the yarn and is transmitted to worm gear 35-39, thus gradually coiling the steel band 4'7 on the disc 41. This rocks the shaft 44 and therefore also the rocking arm 45 mounted thereon. This rocking motion is transmitted through the roller 46 to the friction wheel 2, thus causing it to shift in relation to the friction wheel 3, thereby gradually reducing the speed of the bobbin and thus keeping the rate of winding of the yarn at a uniform level.

When the bobbin has attained the desired diameter, the displaced friction'wheel 2 is returned to its original position, for which purpose the worm 39 is brought, by means of the shaft 40, out of engagement with the worm wheel 3'7 and returned to its original position, for example by means of a manual shaft. On that position being reached the worm 39 is once more brought into gear with the worm wheel 3'7.

I claim:-

In a yarn winding machine for winding at uniform rate as the diameter of the bobbin increases. the combination with friction drive gearing including a displaceable member, at least one rotatable bobbin shaft operatively connected with the friction gearing, a reciprocable thread guide, a rotatable swash. plate also operatively connected with the friction gearing, and a slidably mounted rod carrying the thread guide, of a member turnably but non-slidably mounted on the rod to engage the swash plate, means whereby the member can be set in different angular positions according to the required amplitude of reciprocation of the thread guide, ratchet mechanism connected with the friction gearing and positively operable simultaneously with the rotation of the. bobbin shaft and reciprocation of the thread guide, and means operable by the ratchet mechanism for progressively shifting the displaceable member of the friction gearing.

- ERNST SCHWEIZER. 

